Supporting bracket



Aug, -23, 1927.

. MARLl-:wsKl

SUPPORTING BRACKET4 Filed May e. l1921:?

Patented Aug. 23, 1927.

uNlTr-:DA As-TATESv ALBERT MARLEWSKI, or. clarifies@ILLINoIs.l j

SUPPORTING BRACKET.

Application led May 8,

This invention relates to a safety supporting bracket or platform for use in cleaning windows from the outside.

Itis an object of this invention to provide an improved bracket that can be adjusted to fit various thicknesses and const-ructions of window frames and can be folded up into a small compass when not in use Or while being shifted from one window to another.

It is also an object of this invention to provide means for levelingthe bracket when positio-ned on the window sill and to maintain the platform in position to insure the engagement of the safety hooks over the inner edge of the sill.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter,

more fully described.

On the drawings:

Figure 1- is a side elevation of a device embodying the features of the invention in plan on a window sill.

Figure 2 is a rear view thereof.

Figure 3 is an end fragmentary sectional View taken on the line III-III Vof Figure 1. i

Figure 4 is an end fragmentary sectional view taken on the line IV-IV of Figure 1.

As shown on the drawings:

A cross section of atypical masonry wall is shown with an overhanging stone sill 10 projecting beneath the wood sill 11 of the window frame proper, an interior ornamental sill 12 having a rounded overhang 13 being also indicated. The device yof this invention comprises'a platform and railing built up on a frame comprising parallel inverted T bars` 14 resting on the ornamental sill 12 and having hooks 15 engaging over the overhang 13 thereof, wood filler blocks 16 being fitted over the upstanding edges of the bars 14 to receive the flooring `17. Angle plates 18 are fitted at the outer corners, for a purpose to be brought out later, and slanting bars 19 are secured thereto by the brackets 2O and set screws 21, these bars carrying shoes 22 adapted to engage the corner of the stone sill. The bars 19 are adjustable to fit 1926. Serial No. 107,632.

various wall thicknesses and the outer ends are curved as shown to provide handles.

These bars maintain the hooks 15 in engagement with the overhang 13 of the ornamental sill but are not intended to carry the weight of the platform, which is borne by the adjustable screws 23 which are threaded in the brackets 24 clamped to the bottom rails of the T bars. These screws have a ball and socket engagement with feet 25 which rest on the slanting surface of the sto-,ne sill.

The corner brackets or angle platesA 18 serve as pivots for a rod 26 on which is mounted the lower panel 27 of a railing, the upper panel 28 of which .is pivoted to the upper edge of the lower panel by the rod 29. Suitable pivoted stops 30 prevent relative movement of the upper panel when turned up and likewise hold the upper panel within the bounds of the lower panel when folded, the two panels together then folding down onto the platform. As shown in dotted lines, the lower ends of the lower panel are formed to prevent outward movement thereof beyond the perpendicular.

The side railing panels 31 are similarly made in two sections folding together andV in turn folding down onto the platform, the hinge 32 shown ontheleft in Figurel 2 bringing that panel flat to the platform, while the hinge axis 33 forthe right hand panel is elevated sufficiently above the platform to allow this panel to fold over vthe first one. Then the rear panel -folds down over the two side panels.

The two side panels are held from outward movementy past theperpendicular by the bars 34 and 35 secured to the rear panels, these bars passing down past the outside of the plat-form in folded position. The top bar 35 is engaged by a hinged clamp 36 which holds it to the top bar 37 of the upper side panel. Y

I am aware that many changes may be In a device ofthe class described, a plati form, means for temporarily securing said each pair of standards and adapted to eX- platform in place on a Window sill, skeleton tend above or to be fol-ded between the rerailingsy on three ,sides of said platform speetive pair of standards. adapted to fold down thereon,v one on top lIn testimony whereof I have hereunto of another, said railings eaeh comprising subscribed my name.

a pair of spaced standards, a secondary panel pivoted between the upper portions'of v 1 ALBERT MARLEWSKI. 

